Agree I've been playing with MRLs for about a month now and they can be lethal in the right hands, but those hands aren't definitely mine lol..
Won't go into too many specifics but I have maxed LRE + Braced plating, 100% MRL dmg, 60 something MRL HP just from Museum + council alone but still I can barely make a dent at 3Ds, on 3Os I can take most of them down but when I compare to it mortars? I can easily take any 450+ 3O drone, with no museum, munitions of my own and only playing Aze+Mongols+Council with mortars but to hit the same base with MRLs I need all of what I mentioned above (along with Americans+Ethiopian) and even then it's a hit or miss, 1 rogue zhukov, 1 unaccounted ike and that attack is turning from a 1:40 5* to a 3:15 51% 3*
I have also seen all ht attacks take down top 3Ds in FCs but 1) it's FCs and 2) they were majority fighter attacks with 2 recon, 3 tupos so ground troops really didn't matter much for all we know they could have gotten the same if not better result with all infantry or all shooters
So yes strategies maybe viable except for Lego but they are only limited to people with either deep skill or deep pockets for the average audience who have neither it's still run Lego or go home sadly..